Urgent Force Feeding Help

[joeysgreen]

It's all about mass. I have used some pretty big rocks in terraria and no bulb had enough energy to raise it's temperature significantly. Thinner slabs that have good area, but low mass, will work best in most applications (sometimes a heat sink is desired).

[Simland]

I checked my surface temperatures and my rock and substrate are a few degrees higher than the air temperature, with the rock generally being about 1C above the temp of the soil. But my rock is nowhere near 10 pounds.

[joeysgreen]

What time of day was this; noon? How many hours were the lights on?

[Simland]

It was in the afternoon, if I remember correctly. In the morning after a short time with the heat lamp on, the rock and the soil are at the same temperature, a couple of degrees above the air temperature.